Question

Java: What are the most common mistake of a one dim array?

Answer 1

1) The most common mistake that I have seen people do is assuming that 1d array starts from index 1, but actually it starts from index 0.

2) Some people also try to use an array declaration in a function call.

For example:

int num[N] = {1, 2, 3, 4};

printArray(int num[N]); // this is wrong, instead it should be printArray(num)

3) Again, some people get index out of bound exception because of using <= in a for() loop, not <.

For example,
for(i = 0; i <= N; ++i)
    num[i] = i;